That’s not how language design works. You can’t just postpone such an elementary feature with a TODO, it will interact with every other feature of the language, and if you haven’t left a place for the interactions you have to introduce breaking changes, which will shook the whole ecosystem.

There is zero point in postponing a feature so that you can build a community, which you will burn down later. It’s not a startup that has to be ready in X months or it will fail.